MQ-9 Carbon Monoxide and Methane Gas Sensor Module (CO CH4 Gas Sensor)

The MQ-9 Carbon Monoxide and Methane Gas Sensor Module is a semiconductor gas sensor designed to detect carbon monoxide (CO), methane (CH4), and other combustible gases. It provides both analog and digital outputs, making it easy to interface with Arduino, ESP32, STM32, Raspberry Pi, and other embedded platforms. The module features an onboard LM393 comparator with adjustable sensitivity and is widely used in gas leakage detection, industrial safety, environmental monitoring, and alarm systems.

Key Features -

• Detects carbon monoxide (CO) and methane (CH4)

• Dual analog and digital outputs

• Adjustable sensitivity via onboard potentiometer

• Onboard LM393 comparator

• Fast response and recovery time

• Power and status LED indicators

• Easy microcontroller interfacing

• Stable and reliable performance

• Suitable for dual gas detection systems

• Ideal for safety monitoring applications

Specifications -

• Product type - Gas Sensor Module

• Sensor type - Semiconductor Gas Sensor

• Target gases - Carbon Monoxide (CO) and Methane (CH4)

• Operating voltage - 5V DC

• Output type - Analog and Digital

• Comparator IC - LM393

• Sensitivity adjustment - Onboard Potentiometer

• Preheat time - Required for Stable Operation

• Working current - Moderate Due to Internal Heater

• Board type - Carbon Monoxide and Methane Gas Sensor Module

Applications -

• Carbon monoxide detection

• Methane gas monitoring

• Gas leakage alarm systems

• Industrial safety systems

• Environmental monitoring

• Arduino and IoT projects

• Home safety systems

• Embedded electronics